弯曲半径对TA18钛合金导管服役性能影响分析  

Analysis of Influence of Bending Radius on Performance of TA18 Titanium Alloy Tube

作　　者：周立洋 佟晓龙 江守龙 ZHOU Liyang;TONG Xiaolong;JIANG Shoulong(Shenyang Aircraft Design&Research Institute,Shenyang 110034,china)

机构地区：[1]沈阳飞机设计研究所,辽宁沈阳110034

出　　处：《飞机设计》2024年第6期48-52,共5页Aircraft Design

摘　　要：钛合金具有优异性能,可用于航空液压管道制造,以满足高性能和轻量化的需求。然而,钛合金加工成型困难,导管在弯曲过程中易发生减薄和畸变等问题,影响导管的服役性能。为解决此问题,文中通过仿真研究了不同弯曲半径下TA18钛合金导管的成型过程,并重点考察了弯曲半径对弯管成型后壁厚减薄率和椭圆度的影响。基于成型仿真结果,对成型后的各弯管进行了强度和疲劳分析,进一步研究了弯曲半径对导管的强度性能的影响。研究结果表明:增大弯曲半径可以改善成型精度和管道的服役性能,并可以为确定钛合金导管允许的最小弯曲半径提供指导,为钛合金导管的弯曲成型和性能评价提供了可靠的数据支持。Titanium alloy exhibits exceptional performance and finds applications in aviation hydraulic pipelines,meeting the requirements for high performance and lightweight hydraulic systems.However,processing and forming titanium alloy present challenges,leading to susceptibility to thinning and distortion during the bending process,consequently impacting tube performance.This study simulated the forming process of TA18 titanium alloy tubes with different bending radii and investigated the influence of bending radius on thickness thinning rate and tube ovality.Based on the results of the forming simulations,the strength and fatigue of each bent tube after forming was analyzed,and the influence of bending radius on the service performance of the tube was analyzed.The research shows that increasing the bending radius could improve the forming accuracy and service performance,which provides a reference for determining the minimum allowable bending radius of titanium alloy tubes and provides data support for the bending forming and performance evaluation of titanium alloy tubes.

关 键 词：导管 TA18钛合金 弯曲半径 有限元 强度分析 

分 类 号：V229.5[航空宇航科学与技术—飞行器设计]